refactor: generate customize copilot

[yuqizhou77]

• scaffold basic GPT and GPT with plugin from scratch
• generate basic GPT + plugin from existing API spec.

[codecov]

Codecov Report

Attention: Patch coverage is 92.50000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 87.79%. Comparing base (5f9af3c) to head (0ac40ac).
Report is 8 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #11441      +/-   ##
==========================================
+ Coverage   87.78%   87.79%   +0.01%     
==========================================
  Files         495      495              
  Lines       29668    29726      +58     
  Branches     5741     5808      +67     
==========================================
+ Hits        26043    26099      +56     
+ Misses       1781     1779       -2     
- Partials     1844     1848       +4     

Files	Coverage Δ
...ackages/fx-core/src/component/coordinator/index.ts	87.20% <100.00%> (+0.02%)	⬆️
...src/component/generator/copilotPlugin/generator.ts	95.39% <100.00%> (+0.25%)	⬆️
...src/component/generator/templates/templateNames.ts	100.00% <100.00%> (ø)
packages/fx-core/src/question/create.ts	92.93% <100.00%> (ø)
packages/spec-parser/src/interfaces.ts	100.00% <ø> (ø)
packages/spec-parser/src/specParser.ts	98.18% <ø> (ø)
packages/spec-parser/src/manifestUpdater.ts	93.03% <66.66%> (-0.47%)	⬇️
...t/driver/teamsApp/utils/CopilotGptManifestUtils.ts	93.93% <89.47%> (+7.27%)	⬆️

... and 6 files with indirect coverage changes